Fertilizing method for paddy rice

Abstract

The invention discloses a fertilizing method for paddy rice. The fertilizing method comprises a first step of selecting biogas slurry and biogas residue with normal gas production 2 or more months; a second step of soaking seeds with the biogas slurry: immersing the seeds for 2-4 hours; a third step of fertilizing in a rice seedling bed: the third step comprises two procedures of fertilizing a base fertilizer in the rice seedling bed by applying the biogas residue, diammonium phosphate, potassium chloride and poly(aspartic acid) in combination with plough before reorganizing the bed; and fertilizing an additional fertilizer in the rice seedling bed in two stages, spraying a ammonium sulfate solution before a three-leaf stage; and topdressing diammonium phosphate one day before the paddy rice seedlings are taken out from the rice seedling bed; a fourth step of fertilizing in a big field: the fourth step comprises two procedures of fertilizing a base fertilizer in the big field by using the biogas residue, diammonium phosphate and potassium chloride as the base fertilizer, and simultaneously mixing the poly(aspartic acid) into the base fertilizer; and fertilizing an additional fertilizer in the big field in three stages being a tailoring fertilizer and a fertilizer for head sprouting respectively, wherein the tailoring fertilizer is applied in half a month after the paddy rice seedlings are transplanted, and in the stage, ammonium sulfate and a calcium-silicon fertilizer are applied; and at the same time, a mixed solution of the biogas slurry and poly(aspartic acid) are sprayed on leaf surfaces; and the fertilizer for head sprouting is applied 15-18 days before the head sprouting, and in the stage, a mixed solution of the biogas slurry and poly(aspartic acid) are sprayed on the leaf surfaces.

Description

technical field [0001] The invention relates to a rice cultivation method, in particular to a rice fertilization method. Background technique [0002] Rice is one of the most important food crops. As direct food, rice provides more than 20% of food energy for human beings. The annual fertilizer requirement is about 8 million tons, accounting for 17-20% of my country's fertilizer consumption. In recent years, biogas construction has developed rapidly and produced good economic and social benefits. However, biogas waste cannot be digested and utilized in time, which will also affect the normal operation and circulation of biogas digesters. Biogas slurry and biogas residue not only have complete nutrients and fast fertilizer efficiency, but also are easy to absorb and have less residue, which is convenient for improving the rhizosphere environment of the soil, loosening the soil, and rarely accumulating salt. Polyaspartic acid is a polymer of amino acids, a water-soluble polype...

AI Technical Summary

Problems solved by technology

[0002] Rice is one of the most important food crops. As direct food, rice provides more than 20% of food energy for human beings. The annual fertilizer requirement is about 8 million tons, accounting for 17-20% of my country's fertilizer consumption. In recent years, biogas construction has developed rapidly, which has produced good economic and social benefits. However, biogas waste cannot be digested and utilized in time, which will also affect the normal operation and circulation of biogas digesters.